If you want to see the current values of SQL*Plus system settings, you can use the SHOW command
as shown in the following tutorial exercise:

SQL> SHOW AUTOCOMMIT
autocommit OFF
SQL> SHOW HEADING
heading ON
SQL> SHOW LINESIZE
linesize 80
SQL> SHOW PAGESIZE
pagesize 14
SQL> SHOW FEEDBACK
FEEDBACK ON for 6 or more rows
SQL> SHOW TIMING
timing OFF
SQL> SHOW NULL
null ""
SQL> SHOW ALL
appinfo is OFF and set to "SQL*Plus"
arraysize 15
autocommit OFF
autoprint OFF
autorecovery OFF
autotrace OFF
blockterminator "." (hex 2e)
cmdsep OFF
colsep " "
compatibility version NATIVE
concat "." (hex 2e)
copycommit 0
COPYTYPECHECK is ON
define "&" (hex 26)
describe DEPTH 1 LINENUM OFF INDENT ON
echo OFF
...